Note that there were also students who didn’t improve much. The improvements depend on many things such as how much basic foundations they had had before they took my lessons, how many times they reviewed my comments and texts after each lesson, etc.

Keep in mind that most students above were the retirees and had a lot of time to study Go. Also they continue studying. In my experience it’s better to continue studying even if you have time to study 5 or 10 minutes every day, every other day, or every week.

Some people take an intensive lesson from me and could improve in a short time. But they stop for a while, and then they go back to their original level.